use of unitialized variable in read_entry.c

[Wolfgang Rohdewald]

found by valgrind in ncurses 5.3:

>> at line 200:
    /* grab the name (a null-terminate string) */
>> here, buf can contain anything
    read(fd, buf, min(MAX_NAME_SIZE, (unsigned) name_size));
>> if name_size < MAX_NAME_SIZE, buf[name_size..MAX_NAME_SIZE-1] is still 
>> unitialized
    buf[MAX_NAME_SIZE] = '\0';
>> it still is.
    ptr->term_names = typeCalloc(char, strlen(buf) + 1);
>> strlen(buf) reaches buf[name_size] which is unitialized.

So if buf[name_size] etc. contain something !=0 
term_names has garbage added to its end.

My proposal: add a memset:

Wolfgang

--- read_entry.c.org    Tue Jan 21 07:46:23 2003
+++ read_entry.c        Tue Jan 21 07:47:04 2003
@@ -198,6 +198,7 @@
     }

     /* grab the name (a null-terminate string) */
+    memset(buf,0,MAX_NAME_SIZE);
     read(fd, buf, min(MAX_NAME_SIZE, (unsigned) name_size));
     buf[MAX_NAME_SIZE] = '\0';
     ptr->term_names = typeCalloc(char, strlen(buf) + 1);